Home / 819,703.60-1,229,555.40-258,738.10

Finding the Fourth Proportional to 819,703.60, 1,229,555.40 and 258,738.10

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Solution

The fourth proportional to 819,703.60, 1,229,555.40 and 258,738.10 is: 388,107.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,703.60 : 1,229,555.40 = 258,738.10 : x
  2. Step 2: Convert to fraction form
    819,703.60/1,229,555.40 = 258,738.10/x
  3. Step 3: Cross multiply
    819,703.60x = 1,229,555.40 × 258,738.10
  4. Step 4: Simplify right side
    819,703.60x = 318,132,828,040.74
  5. Step 5: Solve for x
    x = 318,132,828,040.74/819,703.60
  6. Step 6: Final answer
    x = 388,107.15

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.